Stock Portfolio Tracker

CodeAlpha Python Programming Internship | Task 2

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📌 Goal

A stock tracker that calculates total investment value, current value, and profit/loss based on manually defined stock prices.

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📁 Project Files

File	Purpose
main.py	Main script — stock tracker with menu
portfolio_<timestamp>.csv	Auto-generated output file with portfolio summary

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▶️ How to Run

No external libraries needed. Uses only built-in Python modules.

python main.py

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🎮 How to Use

==================================================
  Stock Portfolio Tracker
==================================================

  1. Add stock
  2. View portfolio (with profit/loss)
  3. Remove/sell stock
  4. Save portfolio to CSV
  5. Exit

1. Add stock — enter symbol, quantity, and your buy price (or press Enter to use the current market price). Adding more shares of an existing stock automatically calculates a weighted average buy price.
2. View portfolio — shows quantity, buy price, current price, invested amount, current value, and profit/loss (in $ and %) for each stock, plus an overall total.
3. Remove/sell stock — sell part or all of your shares of a stock.
4. Save portfolio to CSV — exports the full breakdown including profit/loss to a .csv file.
5. Exit — quit the program.

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📈 Available Stocks (Current Market Price)

Symbol	Price ($)
AAPL	180
TSLA	250
GOOGL	140
MSFT	380
AMZN	185
META	490
NFLX	620
NVDA	875
AMD	165
INTC	35

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🔍 Sample Output

  ================================================================================
  PORTFOLIO SUMMARY
  ================================================================================
  Symbol     Qty      Buy $      Cur $     Invested        Value          P/L    P/L %
  --------------------------------------------------------------------------------
  AAPL         5     170.00     180.00       850.00       900.00 +      50.00 +   5.88%
  TSLA         5     250.00     250.00     1,250.00     1,250.00 +       0.00 +   0.00%
  --------------------------------------------------------------------------------
  TOTAL                                    2,100.00     2,150.00 +      50.00 +   2.38%
  ================================================================================
  [+] Overall: You're up $50.00 (2.38%)

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💡 Key Concepts Used

• dictionary — hardcoded current stock prices
• input/output — user enters stock symbol, quantity, and buy price
• basic arithmetic — invested amount, current value, profit/loss calculations
• file handling — saves portfolio summary (with P/L) to .csv file

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🚀 Extra Features Added Beyond the Original Brief

• Profit/Loss tracking — compares your buy price against current market price to show gains/losses per stock and overall, in both dollar amount and percentage.
• Weighted average buy price — adding more shares of a stock you already own recalculates your average cost basis automatically.
• Sell/remove option — sell part or all of a holding directly from the menu.
• Detailed CSV export — saved file includes buy price, current price, invested amount, value, and P/L columns.